Monster Hurricanes Once Plagued East Coast and May Return

While Europe was going through the Middle Ages, America's East Coast was being pummeled by hurricanes at least as intense as Katrina every 40 years or so, climate detectives say.

Between the years 250 and 1150, almost two dozen Category 3 and Category 4 storms left their signatures in sediment deposits in Salt Pond on Cape Cod, Massachusetts, the researchers report in a study published online Wednesday by Earth's Future, one of the American Geophysical Union's open-access jo...